Ronald ColmanDr. Martin Arrowsmith Helen HayesLeora Tozer Arrowsmith Richard BennettGustav Sondelius A.E. AnsonProfessor Max Gottlieb Clarence BrooksDr. Oliver Marchand Russell HoptonTerry Wickett David LandauState Veterinarian Lumsden HareSir Robert Fairland Erville AldersonPioneer (uncredited) Ward BondCop (uncredited) Beulah BondiMrs. Tozer (uncredited) Florence BrittonMiss Twyford (uncredited) Nora CecilNurse (uncredited) Sidney De GrayDr. Hesselink (uncredited) Cyril DelevantiCommittee Member (uncredited) Walter DowningCity Clerk (uncredited) Gibson GowlandCommittee Member (uncredited) Sherry HallReporter (uncredited) Theresa HarrisNative Mother (uncredited) Raymond HattonDrunk (uncredited) Charlotte HenryPioneer Girl (uncredited) George HumbertItalian Uncle (uncredited) DeWitt JenningsB.W. Tozer (uncredited) Mike LallyReporter (uncredited) Lillian LawrenceWest Indies Townswoman at Meeting (uncredited) Carl M. LevinessShip's Passenger (uncredited) James A. MarcusOld Doctor (uncredited) Eric MayneDignitary at Luncheon (uncredited) Kendall McComasLittle Johnny (uncredited) Edmund MortimerShip's Passenger (uncredited) John QualenHenry Novak (uncredited) Edward ReinachDignitary (uncredited) Milton RoyceIntern (uncredited) Harry SchultzBartender (uncredited) Pat SomersetShip's Officer (uncredited) Adele WatsonMrs. Novak (uncredited) Bobby WatsonLittle Neighbor (uncredited) Eric WiltonShip's Officer (uncredited) Arthur Hornblow Jr.Eksekutiv produsent Richard DaySet Decoration Ray JuneDirector Of Photography Herbert SutchAssisterende regissør Alfred NewmanMusic Director 
